Post-mold.



IOv

i To all whom it may concern: r

,UNITED STATES:

PATENT. OFFICE. v

Specification of Letters Patent.'

Patented Karen 12, 1907.

Application 510d October 81. 1906- florid lie-841,869-

Be it known that I,'DmDRIo11 Crmrs'ro PHER ADDroKs, a citizen of the United States, residing at Stroh, in the county of Lagrange and State of Indiana, have invented a new and Improved Post-Mold, of which the following is a specification.

My invention relates to means for molding fence or other posts of concrete or other eementitious material and the object of my invention is to provide a post-mold that shall be light and strong, that will hold metal reinforcements rigid while the plastic material is being compacted, one that can be cheaply and easily produced, and one in which a post of maximum strength for its Weight can be molded. I attain this object by the construction illustrated in the accompanying drawings, in which- Figure 1 is a side view of the entire mold. Figs. 2 and 3 are end views of the mold caps or ends. Figs. 4, 5, and 6 are cross-sections on the lines A A, B B, and O C, respectively. Figs. 7 and 8 are top views of mold caps or ends. Figs. 9 and 10 are views of the moldsupports. Figs. 11 and 12 are side views of the tension device for the reinforcing-rods.

' Fig. 13 is a view of a small collar to hold one end of a reinforcing member. Figs. 14 and 15 are end views of the tension device.

Snrular reference characters refer to like parts throughout the several views.

til it had properly hardened. ()ne 'jection to this process is that hair-cracks Fence-posts of concrete have usually been made by the dry process-that is, as little water was employed as ossible, The molded post could then be ta en from the mold at once and carried to the storage-room, where it would be sprinkled at proper intervals upeat 0 the mold, when this process is employed, until the material has set. In the dry process the metal reinforcement isplaced in position and there remains. Inthe wet process the reinforcement should be held in position until the post sets oth erwiseitwill sink through the soft paste to the bottom of the mold.

In the accompanying drawing, 1 is a shell of the mold of sheet metal, which is generally T-shaped in cross-section. The mold is tapering and bulges out at 2 to form an enlargement in the lower end of the post to prevent the frost from pulling the post out of the ground. A cap 3 fits over the small end of the shell and a cap 4 over the lower end. Each is provided with a flange 5 6 to hold it in place. The flange does not extend across the top or open side of the mold.

The post 1s reinforced by longitudinal tension members, which are preferably'wires or rods 7 of any-desired size, depending upon the kind of work the post is to perform. These wires may be as numerous as desired and while the post is being 'molded project through holes Sin the cap 3. A small collar 9, having a set-screw 10, is fastened to this end of each rod and prevents it from slipping toward the other end. The reinforcing members also project'through holes 11 in the cap 4 and into the tighteners. These consist of acase formed of sides 12, a base 13,

having a slot 14, and a top 15. The bolt 16 passesethrough a hole in the top and has a thumb-nut 17 at its outer end. The inner end of this bolt is flattened and has a flange 18. A cam 19, having a handle 20, is pivoted on the bolt 21, carried by the flattened portion 22 of the bolt.

When a rod 7 is pushed through a hole 11 in the cap 4, a tightener. is slipped overthe end and the cam 19 turned to the position shown in Fig. 12, when the bolt 16 will be locked to the rod. '1 he thumb-nut 17 is now turned down, putting atensional stress on the rod 7 and ho ding it firmly in position, and also through the rod holding the caps on the ends of the mold. 'I he other rods 7 are then placed where desired, and the semiliquid concrete is poured into. the mold. The usual fence-clips can be set into the concrete wherever desired after the top face has been smoothed down. Ihe concrete remains in the mold until it has set, when the caps are removed, the mold turned over onto the ground, and'the edges 23 of the shell sprung out until thepost is released. This supports 24 and 25 may be of wood, iron, or any other desirable material.

If desired, the mold bedded in sand.

For shipment these molds can easily be nested bywslipping one into another.

may be partially em-' Having now explained my improvements, 2.A post-mold comprlsmghlan integral what I claim as my invention, and desire to secure by Letters Patent; is

1. A post-mold comp an integral tapering sheet-metal shell of win ortion is formed of parallel sides connected By a semicylindriqal portion, andithe upper portion by curvedsides and portions connecting the curves to the parallel lower sides, the shell being bulged out at the larger end at the. corners between the upper and lower portions; reinforcing-rods; perforated caps adapted to fit over the ends of the shell; set collars adapted to fit over the upper-"ends of the rods; and tightening means to engage the opposite end of each reinforcing-rod to hold the rods and the caps in position.

oh the lower shell of thin sheet metal w ch may be sprung to discharge the molded post per- 20 forated caps to fit the ends of the shell, and means to engage the ends of reinforc members that extend longitudinally throli g li the mold and out through the perforations in the caps to tension the reinforcing members 2 5 individually and hold the ca s-in position.

In testimony whereof I ve sined my name In the presence of two subscri ing nesses.

mnnmcn onmsrornim rumors.

witnessesz. v

' .N. S. SPENCER,"

LESTER PALMER. 

